45078309 has 16 divisors (see below), whose sum is σ = 68938240. Its totient is φ = 29082240.

The previous prime is 45078307. The next prime is 45078323. The reversal of 45078309 is 90387054.

It is not a de Polignac number, because 45078309 - 2¹ = 45078307 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45078307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26092 + ... + 27765.

It is an arithmetic number, because the mean of its divisors is an integer number (4308640).

Almost surely, 2^45078309 is an apocalyptic number.

It is an amenable number.

45078309 is a deficient number, since it is larger than the sum of its proper divisors (23859931).

45078309 is a wasteful number, since it uses less digits than its factorization.

45078309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53897 (or 53891 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 45078309 is about 6714.0382036447. The cubic root of 45078309 is about 355.8955344075.

The spelling of 45078309 in words is "forty-five million, seventy-eight thousand, three hundred nine".